Gas cutting apparatus.



H. BIRD & F. l. MAEURER.

GAS CUTTING APPARATUS. APPLTCATION FILED OCT. 16. 19|?- Patented Jan. 21, 191%).

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H. BIRD & F. J. MAEURER.

GAS CUTTING APPARATUS.

APPLICATION FILED ocT.16.1911.

1,291,735. Patented Jan. 919.

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` VLA Ano/Mfr `/IT/ VEN TORS y Worthy C HARRISON BIRD AND FREDRICK J. MAEURER, OF CHICAGO, ILLINOIS, ASSIGNORS TO DAVIS-BOUBNONVILLE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

an sfra'ras PATENT carica.

eas cnfrfrINe APPARATUS.

Specification of Letters Patent.

Patented -J an. 21, 1919.

Application led October 16, 1917. Serial No. 196,792.

` have invented new and useful Improvements in Gas Cutting Apparatus, of which the following is a specification.

The invention relates to gas cutting apparatus of the type disclosed in Patentv No. 1,118,183, ganted November 24, 1914, to ucknam, comprising a portable, mechanically-driven, torch-bearlng carriage adapted to run upon an underlying surface and to cut upon either straight or curved lines, the latter throu h the provision of a center which may be rought into engage? ment with the surface; and the Aobject is to equip such apparatus with means whereby it may be used to cut various irregular or desired shapes throughthe aid of a suitable templet. To this end the carriage is provided with a flexible arm, anda roller to coperate with the edge of the templet.

In the accompanying in the invention:

igure 1 is a rear elevation of the apparatus with parts broken away for the sake of clearness of illustration and economy of space. It will be understood that, when the carriage is operating with the attachment, the center 14 is depressed into engagement with the underlying surface and the wheel 6 is removed therefrom.

Fig. 2 is a plan view with portions broken drawings illustratawa The carriage 2, while of more modern form than that disclosed in the patent aforesaid, is the same in essentials and may be described briefiy. It comprises a platform 3, on which is mounted a small electric motor 4. The carriage has two front wheels 5 and 6, and referably a single rear wheel 7 in line wit the wheel 5. 8 is a horizontal radius rod secured to the forward part of the carriage and projecting beyond the side remote from the wheels 5 and 7. -This rod is shown as constituting the support for the wheel 6. The driving power is applied to the front wheels through a change-speed gearing contained in a case 9 and forming no art of this invention, a vertical vworm she 10, and a transverse shaft 11 bearing bearing the torch,

Adjustable so as to be set at various points along the radius rod is a center 14, which may be screwed down into engagement with the work or other underlying surface. A counterweight 15 is placed upon the rod be yond the center.

Rising from the front inner corner portion of the .carriage is the post 16, from which the torch is adjustably supported. In the present instance this post serves for the attachment of a jointed arm 17, in the outer portion of which the torch 18 is suitably mounted. This arm preferably comprises two sections 19 and 20` pivotally connected to each other at 21. The mner section 19 has a split clamp collar or hub 22, whereby it may be adjusted angularly about the post 16. The jointed arm 17 enables the torch to follow the outline of a suitable templet, such as indicated for example at 23; and to this end the arm carries, in addition to the torch, a roller 24 adjacent the torch tip to travel against the edge of the templet. This roller may find its unmediate support upon the torch, to which it may be detachably secured by a clamp 25. A spring 26 at the joint 21 tends to contract the arm so as to hold the roller 24 in contact with the edge of the templet. It will thus be seen that, while the carriage describes a circle, the torch in its cut will follow a path determined by the templet. The'templet may be the edge of the underlying surface upon which the carriage travels, or it may be a separate piece.

In conclusion, it is to e understood that we do not limit ourselves to the specific construction illustrated, as other embodiments may be devised.

What we claim as new is;

1. In agas cutting a paratus, the combination of a portable sel -supporting mechanically-driven Wheeled carriage adapted to run upon an vunderlyin surface, a point center connected therewlth and adapted to 2. In a gas cutting apparatus,

be engaged with the the combiv Vons nation of a portatile self-supporting `mechanically-driven wheeled carriage adapted to run upon an underlying surface, a center connected therewith to cause the same to describe a circle, a jointed arm extendin from the carriage adapted to extend an contract, a cutting torch supported by the arm, a roller adjacent thek torch to travel against a suitable templet, and a spring acting upon the arm.

3. ln a gas cutting apparatus, the cornbination of a portable self-supporting rnemomen chanicall'y-driven wheeled carriage adapted.V

to run upon an underlying surface, a center f connected therewith to cause the same to describe a circle, a` pivotally jointed torchbearing arm adapted to extend and con-v tract having an angularly adjustable mounting on the carriage and means to coperate with a suitable templet, and a spring acting upon the arm.

HARRSN BERD. j FREDRECK J. MAEER. 

